Labour MPs are already plotting to bring back David Miliband after Jeremy Corbyn’s victory.

The triumph of left-winger Jeremy Corbyn has spurred on the Labour MPs who are secretly working for a dramatic Miliband comeback ahead of the 2020 general election.

Oh brother: Ed Miliband and Corbyn (Image: Getty)

He has headed up the a New York-based charity called the International Rescue Committee since 2013.

But his allies at Westminster believe Mr Miliband could be persuaded to make a sensational return to the Commons by 2018 at a by-election for a safe Labour seat.

A senior Labour MP said: “If Corbyn is not up to the job as leader, there will definitely be another leadership contest.

A new hope: David Miliband (Image: ROWAN GRIFFITHS)

“The best person for the job by a country mile would be David Miliband and overtures have already been made to him about a potential return.

“If things turn out as horrendously as we fear they will under Corbyn, David would be the only hope of saving the Labour Party.”

In a separate move, several MPs are also looking at ways of changing the Labour Party’s rules to make future leadership challenges easier.

At present, anyone trying to oust a Labour leader needs to put themselves forward and win the backing of a fifth of Westminster’s Labour MPs.

But a rival plan put forward earlier this year by ex-Labour Minister Frank Field would mean just 30 anonymous Labour MPs could trigger a vote of confidence in the leader to get rid of a “deadbeat” leader.

Labour MPs believe they could persuade one of their elderly colleagues to retiring from a safe Labour seat to pave the way for Mr Miliband to return in a by-election.

Huddersfield Labour MP Barry Sheerman, aged 74, whose daughter works for Mr Miliband in the States, has denied reports he would give up his seat to allow David Miliband’s return to the Commons.

Man of the moment: David Miliband (Image: PA)

One ally of Mr Miliband’s told the Sunday Mirror: “David is happy in American and doing very important work, especially during the current refugee crisis. But who knows what will happen in future? “

After Labour’s general election loss in May, David Miliband criticised his brother Ed for “dividing” voters and leading Labour to a “devastating” defeat.

Labour insiders believe that the party could lose more than 500 seats in council elections next May, fuelling speculation about Mr Corbyn’s leadership.

David Miliband did not publicly endorse a candidate in Labour’s leadership election, but is known to be closest politically to Liz Kendall.